格拉德斯通研究所（Gladstone Institutes）的研究团队在《Molecular Cell》期刊发表了一项研究发现，揭示了一种被称为“VI型retron”的细菌防御系统 1。与传统认知中通过抑制毒素来发挥作用的retrons不同，这一系统在病毒入侵后才产生DNA，进而激活细菌的自毁程序 1。这种机制导致受感染的细菌主动死亡，从而有效阻止病毒进一步扩散 1。
这项研究由资深作者Seth Shipman和第一作者Karen Zhang主导，并与哥本哈根大学、加州大学旧金山分校等机构合作完成 1。论文标题为“Reverse transcribed ssDNA derepresses translation of a retron antiviral protein”，实际发表于2026年10月13日，相关报道发布于2026年10月31日 1。研究人员指出，这一发现颠覆了科学界对细菌免疫的传统理解，并为开发更精确的DNA编辑工具、合成分子传感器及开关提供了潜在的分子基础 1。此外，该机制还可能被应用于针对有害细菌的新型抗菌疗法研发 1。
Researchers at the Gladstone Institutes have identified a unique bacterial immune mechanism known as type VI retrons, which operates in direct contrast to previously understood systems. Published in the journal Molecular Cell, the study reveals that this defense system activates only after a virus has invaded the bacterium, producing DNA to trigger self-destruct protocols rather than inhibiting toxins beforehand 1. The discovery challenges traditional views of bacterial immunity by demonstrating that protection is achieved through the suicide of infected cells to prevent viral spread 1.
The findings were led by senior author Seth Shipman and first author Karen Zhang, with contributions from collaborating teams at the University of Copenhagen and the University of California, San Francisco 1. The specific paper, titled "Reverse transcribed ssDNA derepresses translation of a retron antiviral protein," was published on October 13, 2026 1. This novel biological pathway holds potential for biotechnology applications, including the development of more precise DNA editing tools, synthetic molecular sensors, and new antibacterial therapies designed to target harmful bacteria 1.
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